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[ARM] Read memory as unsigned integer

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When GDB read inferior memory as an address or an instruction,
it should be unsigned.

gdb:

2016-11-30  Yao Qi  <yao.qi@linaro.org>

	* arm-tdep.c (arm_scan_prologue): Read memory as unsigned integer.
	(arm_exidx_unwind_sniffer): Likewise.
This commit is contained in:
Yao Qi 2016-11-30 11:55:56 +00:00
parent e9a38e0f52
commit 7913a64cab
2 changed files with 14 additions and 8 deletions
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5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2016-11-30 Yao Qi <yao.qi@linaro.org>
* arm-tdep.c (arm_scan_prologue): Read memory as unsigned integer.
(arm_exidx_unwind_sniffer): Likewise.
2016-11-28 Simon Marchi <simon.marchi@polymtl.ca>
* record-full.c (record_full_open_1): Fix debug output.

17
gdb/arm-tdep.c
View File

@ -1807,10 +1807,11 @@ arm_scan_prologue (struct frame_info *this_frame,
the callee (or at the present moment if this is the innermost frame).
The value stored there should be the address of the stmfd + 8. */
CORE_ADDR frame_loc;
LONGEST return_value;
ULONGEST return_value;
frame_loc = get_frame_register_unsigned (this_frame, ARM_FP_REGNUM);
if (!safe_read_memory_integer (frame_loc, 4, byte_order, &return_value))
if (!safe_read_memory_unsigned_integer (frame_loc, 4, byte_order,
&return_value))
return;
else
{
@ -2659,19 +2660,19 @@ arm_exidx_unwind_sniffer (const struct frame_unwind *self,
ensure this, so that e.g. pthread cancellation works. */
if (arm_frame_is_thumb (this_frame))
{
LONGEST insn;
ULONGEST insn;
if (safe_read_memory_integer (get_frame_pc (this_frame) - 2, 2,
byte_order_for_code, &insn)
if (safe_read_memory_unsigned_integer (get_frame_pc (this_frame) - 2,
2, byte_order_for_code, &insn)
&& (insn & 0xff00) == 0xdf00 /* svc */)
exc_valid = 1;
}
else
{
LONGEST insn;
ULONGEST insn;
if (safe_read_memory_integer (get_frame_pc (this_frame) - 4, 4,
byte_order_for_code, &insn)
if (safe_read_memory_unsigned_integer (get_frame_pc (this_frame) - 4,
4, byte_order_for_code, &insn)
&& (insn & 0x0f000000) == 0x0f000000 /* svc */)
exc_valid = 1;
}